Fire extinguisher



Nov. 1, 1927.

C. LE R. NEVIN FIRE EXTINGUISHER serleoyl ATTORNEYS l Patented Nov. 1, 11927,.

*tweeter Gunsten :LE nor Mavim or Hononumr, rnanrronv or HAWAII.

helga.

Finn nxfrineursnnn. i

Appucanon'fued July 29,

, tainer is invertedftrom itsr'normal position` An object-.ci the invention is to provide a container Which .Willetiectively prevent y leakage of the chemical at alltiniea` and a valve mechanism Afor the container which is positive in operation to releasethechemical, when the container isinverted. y Y l p 1i further object oft theinvention is to provide a tire extinguisher ot simple7 prac-` tical construction, Which Will be rugged, du-` rable and etiicient in use, which maybe manu` 'i'actuied ivith comparative economy,y which may be readily charged, conveniently manipw ulatedyand which will require the use et no special supporting` brackets for securing it in its normal inoperative position.

ylllith the above noted' and other objects inrview, the invention consistskinkcertain novel features of construction and combinationsr and arrangements ot parts, as Will 'be more fully hereinatterset forth and pointed out in the claims. The invention ymay be more 'fully understood fromthe following' description in connection With the accom# panying drawings, wherein-4" Fig. 1 isa view `in longitudinal section through a tire extinguisher embodying the present invention.

Fig. 2 is a similar view( showing` the extinguisher inverted and in proper position for discharge of the contents thereof.

Fig. 3 is a transverse sectional view on the line 3--3 ot Fig. 2.

Fig. l is a fragmentary sectional detail showing` a modification in which a soldered break plug is substituted for the cap 14.

For the convenience ot description 1 shall call the bottom ot the container-thc part Which constitutes the lower end thereof When the container' is in its normal inoperative position shown in Fig. 1.

The container comprises a metal shell otcylindrical or other appropriate cross sectional shape. The bottom 11 of the shell is formed With a relatively small opening; 12 communieatingv with a nozzle 13 secured beneath the bottom ot the container and normally closed by a screw cap 11i which presses a sealing' disc ot lead or other appropriate material 15 against the outlet end ot the nozzle. The open upper end ot the container ieee. sensing. 1259735.

10 is closed by a cap 16 Welded or brazed` to the container and `'termed With' a threaded nipple 17 receiving athreaded plug 18. The plugr is termed at its upper end with a lnurled head 19 normally clamping` a lead sealing gasket 20fagainst the outer tace ot vcniently supportedupon a tripod consist"` ingotthree legs 21 connected at their .up-` per tends to a split band 22 clamped in posi; tion upon the lower( end of the containerby a clamping screw 23 passed through aligned apertured. 'ears Mat 'theend of the band. A handle member 25straddling the top ot the container may be carried by asimilar split band 26 which engages under the iiange 1Grb ot' 4the vcover 16,and is heldqagainst upward movement. l w i l ltisingscentrally of the container is a pipe 27, the vlovver closed' end 28 o t which is Welded or otherwise secured to the bottom 11 "ofthe container and Jformed With an'y openinpjy 29V registering `with the opening l2 in the container bottom. V*Pipe 27 terminates below the 'cover 16. Mounted in the pipe is a relatively lheavy plunger element 30.(

This'pluniger elementy is ofslightly less `diameterthan the pipe to provide an annular liquidspace between its"outer surface and ythe inner surface of the pipe. Plunger is formed at one end with a suitable valve` member 31 coacting With the valve seat defined. by the opening` 29 in the bottom 28 ot the pipe 27.

las` illustrated the extension 31 is ot approximately conical or needle shape, but Tit is to be understood that various types ot gravity operated valves mi ght beused in this connection. Plunger 30 also terminates short ot the upper end ot the container and has limited axial movement Within the pipe 27 sufficient to permit Withdrawal o the valve 31 from its seat 29 before the plunger engages the plugl 18.

@Plunger 30 may be provided With a screwdriver receiving` slot 35 in lits upper end in order to permit the valve 31 to be ground upon its seat. c l

In charging` the extinguisher, the plug 18 is removed and the container is about threequarters filled with a suitable liquid chemical, such for instance as carbon tetrachloride. The plug' 18 is then replaced. Cap 14 is removeda and the nozzle 13 placed in connection with a suitable source of compressed air which flows up around the plunger 30 and 4the nipplel. The container lOmay be conl into the main chamber of the container. Cap 14 is then replaced, and the device is ready for operation.

In case of fire, the caplt is removed and the container manually grasped and inverted as shown in Fig. 2. It will be noted in this ligure that the plunger 30 has gravitationally dropped, resting on the plug 18 and unseating the valve 31. Consequently the Huid tire extinguishing chemical is ejected by the air pressure through the n ozzle 13, as will be readily understood.

If desired, the plug 18 With its associated parts 17, 19 and 20 may be dispensed with, and the filling done under pressure through the nozzle 13. Y

In Fig. 4I have illustrated a slight modii iication wherein the cap 14 is eliminated and a handle member 40 soldered to the nozzle 13 by a break solder jointindicated at 41. With this form ofthe invention, release of the contents of the extinguisher may be effected by grasping the handle 4, and forcibly swinging or twisting it to break the solder joint.

Various changes and alterations might be made in the general formiand arrangement of parts described Without departingfrom the invention. Hence I do not wish to limit myself to the details set forth, but shall consider myself at liberty to make such changes and alterations as fairly fall Within the spirit and scope of the appended claims.

I claim:

1. A tire extinguisher,including ya casing having a discharge opening iny its bottom and a filling opening in its top, a discharge nozzle connected to the discharge opening and a gravity operated valve element normally closing said discharge opening, said valve element including a relatively heavy elongated bar guided tor limited gravitational axial shifting movement in the casing, the guide means including a tube of greater internal diameter than the external diameter ot the bar.

2. A tire extinguisher including a casing having a discharge opening in its bottom and a filling opening in its top, a discharge nozzle connected to the discharge opening and a gravity operated valve element .normally closing said discharge opening, said valve element including a relatively heavy elongated bar ,guided for limited gravitational axial shifting movement in the casing, the guide means including a tube of greater internal diameter than the external diameter of the bar, said tube being secured to the bottom of the easing and terminating below the top of the casing.

3. A lire extinguisher including a casing having a discharge opening in its bottom and a `filling opening in its top, a discharge nozzle connected to the discharge opening and a gravity operated valve element normally closing said discharge opening, said valve element including a relatively heavy elongated bar guided for limited gravitational axial shifting movement in the casing, the guide means including a tube of greater internal diameter than the external diameter of the bar and having a closed lower end, said tube being secured to the bottom of the casing and terminating below the top of the casing, the closed lower end of the tube having an opening therein registering With the discharge opening in the container bottom.

CHESTER LE ROY NEVIN. 

